Acute Effects of Blood Flow Restriction on Blood Lactate Concentration During an Exercise Bout Original Research
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Keywords
knee extensors, rehabilitation, exercise response, isokinetic dynamometer
Abstract
Introduction: Does low-intensity, acute resistance exercise with blood flow restriction (BFR) elicit a similar blood lactate response as high-intensity exercise without BFR?
Methods: Participants (N = 12; 22 ± 3 years old) attended three visits. The first visit estimated participants' three-repetition maximum (3-RM) for right knee extension. At visits two and three, participants' blood lactate response was measured using a 1-RM percentage, counter-balancing BFR (37% 1-RM, 60% arterial occlusion pressure (AOP)) and non-BFR conditions (65% 1-RM). Baseline blood pressure and blood lactate were measured before the warm-up. Blood lactate response was measured at immediate post-exercise and two minutes post-exercise.
Results: A two-way repeated measures ANOVA found no main effect of treatment (BFR, non-BFR), F(1, 9) = .470, p < .510, but a difference over time, F(2,18) = 23.294, p < .001. Post-hoc analysis with a Bonferroni adjustment indicates that blood lactate concentration increased from baseline to immediate post-exercise (p = .003) and from baseline to two minutes post-exercise (p = .001).
Conclusions: Blood lactate concentrations were similar for knee extension with BFR at 60% AOP and 37% 1-RM, and non-BFR at 65% 1-RM groups. However, blood lactate concentration increased from baseline to post-exercise measures while working at 65% of 1-RM with BFR at 60% AOP.
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